[Zope] VHM, siteroot, et. al.

If I run three sites at- www.mydomain.com intranet.mydomain.com extranet.mydomain.com And I map them to the following locations in my Zope using either VHM or siteroot- /www /intranet /extranet Will I still be able to accquire objects in the root container? For example, a shared database connection?